MS35690F Plain Hexagon Sheet Nut — UNC-2B / UNF-2B

MS35690F defines a series of plain (uncoated) hexagon sheet nuts conforming to the U.S. Military Standard, designed for use in sheet-metal assemblies where a low-profile, high-strength nut is required. These nuts feature a UNC-2B or UNF-2B internal thread and are manufactured to tight dimensional tolerances for reliable mechanical performance in aerospace, defense, and industrial applications.

FULLERKREG supplies MS35690F sheet nuts across all specified materials, surface finishes, and size ranges — from stock or on indent — with full traceability and compliance documentation available on request.

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Product Series Overview

The MS35690F standard encompasses multiple sub-series differentiated by material and surface treatment. All series share the same hexagon sheet nut geometry and UNC-2B / UNF-2B thread class.

Series / Dash No. Prefix	Material	Surface Treatment	Thread Class	Size Range
MS35690F-1xx	Low Carbon Steel	Plain (No Finish)	UNC-2B / UNF-2B	#6 – 1/2"
MS35690F-2xx	Low Carbon Steel	Zinc Phosphate + Oil	UNC-2B / UNF-2B	#6 – 1/2"
MS35690F-3xx	Stainless Steel (CRES 302/304)	Plain (Passivated)	UNC-2B / UNF-2B	#6 – 1/2"
MS35690F-4xx	Brass	Plain	UNC-2B / UNF-2B	#6 – 1/2"

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Dimensional Data & Part Number Reference

All dimensions in inches unless otherwise noted. Thread class: UNC-2B or UNF-2B per ASME B1.1 / B1.2. Dimensions per MS35690F revision F.

Part Number	Nominal Size	Thread (TPI)	Thread Series	Width Across Flats (F) in.	Width Across Corners (G) in.	Thickness (H) in.	Material	Surface	Unit Weight (g)
MS35690F-101	#6	32	UNC-2B	0.250	0.289	0.050	Carbon Steel	Plain	0.20
MS35690F-102	#8	32	UNC-2B	0.312	0.361	0.062	Carbon Steel	Plain	0.35
MS35690F-103	#10	24	UNC-2B	0.375	0.433	0.062	Carbon Steel	Plain	0.55
MS35690F-104	1/4"	20	UNC-2B	0.438	0.505	0.078	Carbon Steel	Plain	0.90
MS35690F-105	5/16"	18	UNC-2B	0.500	0.577	0.094	Carbon Steel	Plain	1.40
MS35690F-106	3/8"	16	UNC-2B	0.562	0.650	0.094	Carbon Steel	Plain	1.90
MS35690F-107	7/16"	14	UNC-2B	0.625	0.722	0.109	Carbon Steel	Plain	2.60
MS35690F-108	1/2"	13	UNC-2B	0.750	0.866	0.109	Carbon Steel	Plain	3.80
MS35690F-111	#6	40	UNF-2B	0.250	0.289	0.050	Carbon Steel	Plain	0.20
MS35690F-112	#8	36	UNF-2B	0.312	0.361	0.062	Carbon Steel	Plain	0.35
MS35690F-113	#10	32	UNF-2B	0.375	0.433	0.062	Carbon Steel	Plain	0.55
MS35690F-114	1/4"	28	UNF-2B	0.438	0.505	0.078	Carbon Steel	Plain	0.90
MS35690F-115	5/16"	24	UNF-2B	0.500	0.577	0.094	Carbon Steel	Plain	1.40
MS35690F-116	3/8"	24	UNF-2B	0.562	0.650	0.094	Carbon Steel	Plain	1.90
MS35690F-117	7/16"	20	UNF-2B	0.625	0.722	0.109	Carbon Steel	Plain	2.60
MS35690F-118	1/2"	20	UNF-2B	0.750	0.866	0.109	Carbon Steel	Plain	3.80
MS35690F-201	#6	32	UNC-2B	0.250	0.289	0.050	Carbon Steel	Zinc Phos + Oil	0.20
MS35690F-202	#8	32	UNC-2B	0.312	0.361	0.062	Carbon Steel	Zinc Phos + Oil	0.35
MS35690F-203	#10	24	UNC-2B	0.375	0.433	0.062	Carbon Steel	Zinc Phos + Oil	0.55
MS35690F-204	1/4"	20	UNC-2B	0.438	0.505	0.078	Carbon Steel	Zinc Phos + Oil	0.90
MS35690F-205	5/16"	18	UNC-2B	0.500	0.577	0.094	Carbon Steel	Zinc Phos + Oil	1.40
MS35690F-206	3/8"	16	UNC-2B	0.562	0.650	0.094	Carbon Steel	Zinc Phos + Oil	1.90
MS35690F-207	7/16"	14	UNC-2B	0.625	0.722	0.109	Carbon Steel	Zinc Phos + Oil	2.60
MS35690F-208	1/2"	13	UNC-2B	0.750	0.866	0.109	Carbon Steel	Zinc Phos + Oil	3.80
MS35690F-211	#6	40	UNF-2B	0.250	0.289	0.050	Carbon Steel	Zinc Phos + Oil	0.20
MS35690F-212	#8	36	UNF-2B	0.312	0.361	0.062	Carbon Steel	Zinc Phos + Oil	0.35
MS35690F-213	#10	32	UNF-2B	0.375	0.433	0.062	Carbon Steel	Zinc Phos + Oil	0.55
MS35690F-214	1/4"	28	UNF-2B	0.438	0.505	0.078	Carbon Steel	Zinc Phos + Oil	0.90
MS35690F-215	5/16"	24	UNF-2B	0.500	0.577	0.094	Carbon Steel	Zinc Phos + Oil	1.40
MS35690F-216	3/8"	24	UNF-2B	0.562	0.650	0.094	Carbon Steel	Zinc Phos + Oil	1.90
MS35690F-217	7/16"	20	UNF-2B	0.625	0.722	0.109	Carbon Steel	Zinc Phos + Oil	2.60
MS35690F-218	1/2"	20	UNF-2B	0.750	0.866	0.109	Carbon Steel	Zinc Phos + Oil	3.80
MS35690F-301	#6	32	UNC-2B	0.250	0.289	0.050	CRES 302/304	Passivated	0.21
MS35690F-302	#8	32	UNC-2B	0.312	0.361	0.062	CRES 302/304	Passivated	0.36
MS35690F-303	#10	24	UNC-2B	0.375	0.433	0.062	CRES 302/304	Passivated	0.57
MS35690F-304	1/4"	20	UNC-2B	0.438	0.505	0.078	CRES 302/304	Passivated	0.93
MS35690F-305	5/16"	18	UNC-2B	0.500	0.577	0.094	CRES 302/304	Passivated	1.45
MS35690F-306	3/8"	16	UNC-2B	0.562	0.650	0.094	CRES 302/304	Passivated	1.96
MS35690F-307	7/16"	14	UNC-2B	0.625	0.722	0.109	CRES 302/304	Passivated	2.68
MS35690F-308	1/2"	13	UNC-2B	0.750	0.866	0.109	CRES 302/304	Passivated	3.92
MS35690F-311	#6	40	UNF-2B	0.250	0.289	0.050	CRES 302/304	Passivated	0.21
MS35690F-312	#8	36	UNF-2B	0.312	0.361	0.062	CRES 302/304	Passivated	0.36
MS35690F-313	#10	32	UNF-2B	0.375	0.433	0.062	CRES 302/304	Passivated	0.57
MS35690F-314	1/4"	28	UNF-2B	0.438	0.505	0.078	CRES 302/304	Passivated	0.93
MS35690F-315	5/16"	24	UNF-2B	0.500	0.577	0.094	CRES 302/304	Passivated	1.45
MS35690F-316	3/8"	24	UNF-2B	0.562	0.650	0.094	CRES 302/304	Passivated	1.96
MS35690F-317	7/16"	20	UNF-2B	0.625	0.722	0.109	CRES 302/304	Passivated	2.68
MS35690F-318	1/2"	20	UNF-2B	0.750	0.866	0.109	CRES 302/304	Passivated	3.92
MS35690F-401	#6	32	UNC-2B	0.250	0.289	0.050	Brass	Plain	0.22
MS35690F-402	#8	32	UNC-2B	0.312	0.361	0.062	Brass	Plain	0.38
MS35690F-403	#10	24	UNC-2B	0.375	0.433	0.062	Brass	Plain	0.60
MS35690F-404	1/4"	20	UNC-2B	0.438	0.505	0.078	Brass	Plain	0.98
MS35690F-405	5/16"	18	UNC-2B	0.500	0.577	0.094	Brass	Plain	1.52
MS35690F-406	3/8"	16	UNC-2B	0.562	0.650	0.094	Brass	Plain	2.05
MS35690F-407	7/16"	14	UNC-2B	0.625	0.722	0.109	Brass	Plain	2.80
MS35690F-408	1/2"	13	UNC-2B	0.750	0.866	0.109	Brass	Plain	4.10
MS35690F-411	#6	40	UNF-2B	0.250	0.289	0.050	Brass	Plain	0.22
MS35690F-412	#8	36	UNF-2B	0.312	0.361	0.062	Brass	Plain	0.38
MS35690F-413	#10	32	UNF-2B	0.375	0.433	0.062	Brass	Plain	0.60
MS35690F-414	1/4"	28	UNF-2B	0.438	0.505	0.078	Brass	Plain	0.98
MS35690F-415	5/16"	24	UNF-2B	0.500	0.577	0.094	Brass	Plain	1.52
MS35690F-416	3/8"	24	UNF-2B	0.562	0.650	0.094	Brass	Plain	2.05
MS35690F-417	7/16"	20	UNF-2B	0.625	0.722	0.109	Brass	Plain	2.80
MS35690F-418	1/2"	20	UNF-2B	0.750	0.866	0.109	Brass	Plain	4.10

* Unit weights are approximate reference values based on material density calculations. Actual weights may vary slightly by lot. Contact FULLERKREG for certified weight data if required.

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Selection Guide

Requirement	Recommended Series	Reason
General industrial / structural	MS35690F-1xx (Carbon Steel, Plain)	Cost-effective, high strength
Corrosion resistance required	MS35690F-3xx (CRES 302/304)	Passivated stainless, no galvanic risk with aluminum
Mild corrosion protection + lubricity	MS35690F-2xx (Zinc Phos + Oil)	Phosphate coating reduces galling, improves torque
Electrical conductivity / non-magnetic	MS35690F-4xx (Brass)	Non-magnetic, good conductivity, corrosion resistant
Fine-pitch thread (higher vibration resistance)	UNF-2B variants (-111 to -418)	Finer pitch = greater resistance to loosening
Coarse-pitch thread (faster assembly)	UNC-2B variants (-101 to -408)	Faster engagement, more tolerant of contamination

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Standard & Specification Reference

• Governing Standard: MS35690, Revision F — Plain Hexagon Sheet Nuts
• Thread Standard: ASME B1.1 (UNC) / ASME B1.2 (UNF), Class 2B
• Dimensional Standard: ASME B18.2.2 (reference)
• Material Standards: QQ-S-763 (Stainless), QQ-B-626 (Brass), SAE J403 Grade 1010/1020 (Carbon Steel)
• Surface Treatment: MIL-DTL-16232 (Zinc Phosphate), AMS 2700 (Passivation)
• Inspection: Per MS35690F drawing requirements; dimensional inspection per ASME B18.18

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Product Photos

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Why FULLERKREG?

• 🏭 Direct Manufacturer — Full in-house production capability, no middlemen
• 📐 Precision to Standard — Strict dimensional control per MS35690F drawing tolerances
• 🔩 Complete Series Coverage — All materials, all finishes, all sizes from a single source
• 📦 Bulk & Wholesale Ready — MOQ-flexible, bulk packaging, reel or bag options
• 📋 Full Traceability — Material certs, test reports, and CoC available on request
• 🌍 Global Shipping — Reliable export logistics to North America, Europe, and Asia-Pacific
• ⚡ Fast Quotation — RFQ response within 24 hours for standard and indent items