MS35650G Plain Hexagon Machine Screw Nut, UNF-2B

MS35650G defines plain hexagon machine screw nuts with UNF-2B internal thread, manufactured to U.S. Military Standard. FULLERKREG supplies the complete MS35650G series across all specified materials, surface treatments, and size ranges — from #2-56 through 1/2-20 — for aerospace, defense, and precision industrial applications.

Series Overview

The MS35650G series covers plain (uncoated or minimally treated) hexagon nuts intended for use with machine screws in UNF (Unified National Fine) thread form, tolerance class 2B. All dimensions conform to MIL-SPEC MS35650 Rev G requirements.

• Thread form: UNF (Unified National Fine), Class 2B
• Nut style: Plain hexagon (low profile / machine screw type)
• Size range: #2-56 through 1/2-20
• Materials: Carbon Steel, Stainless Steel (CRES 300 series), Brass
• Surface treatments: Zinc Plated, Passivated (CRES), Plain (Brass)
• Standard: MS35650 Rev G (U.S. Military Standard)

Dimensional Data

All dimensions in inches. Width Across Flats (WAF) and Thickness (T) per MS35650G drawing table. Width Across Corners (WAC) = WAF × 1.1547. Unit weight (g) is approximate reference value based on geometry and material density.

Part Number	Nominal Size	TPI (UNF)	Width Across Flats (in)	Width Across Corners (in)	Thickness T (in)	Material	Surface Treatment	Unit Weight (g)
MS35650-302	#2	56	3/16 (0.188)	0.217	0.066	Carbon Steel	Zinc Plated	0.10
MS35650-303	#2	56	3/16 (0.188)	0.217	0.066	Stainless Steel (CRES 300)	Passivated	0.10
MS35650-304	#2	56	3/16 (0.188)	0.217	0.066	Brass	Plain	0.09
MS35650-402	#4	48	1/4 (0.250)	0.289	0.079	Carbon Steel	Zinc Plated	0.19
MS35650-403	#4	48	1/4 (0.250)	0.289	0.079	Stainless Steel (CRES 300)	Passivated	0.19
MS35650-404	#4	48	1/4 (0.250)	0.289	0.079	Brass	Plain	0.17
MS35650-602	#6	40	5/16 (0.312)	0.361	0.095	Carbon Steel	Zinc Plated	0.36
MS35650-603	#6	40	5/16 (0.312)	0.361	0.095	Stainless Steel (CRES 300)	Passivated	0.36
MS35650-604	#6	40	5/16 (0.312)	0.361	0.095	Brass	Plain	0.32
MS35650-802	#8	36	11/32 (0.344)	0.397	0.110	Carbon Steel	Zinc Plated	0.50
MS35650-803	#8	36	11/32 (0.344)	0.397	0.110	Stainless Steel (CRES 300)	Passivated	0.50
MS35650-804	#8	36	11/32 (0.344)	0.397	0.110	Brass	Plain	0.45
MS35650-1002	#10	32	3/8 (0.375)	0.433	0.130	Carbon Steel	Zinc Plated	0.72
MS35650-1003	#10	32	3/8 (0.375)	0.433	0.130	Stainless Steel (CRES 300)	Passivated	0.72
MS35650-1004	#10	32	3/8 (0.375)	0.433	0.130	Brass	Plain	0.65
MS35650-1402	1/4	28	7/16 (0.438)	0.505	0.160	Carbon Steel	Zinc Plated	1.30
MS35650-1403	1/4	28	7/16 (0.438)	0.505	0.160	Stainless Steel (CRES 300)	Passivated	1.30
MS35650-1404	1/4	28	7/16 (0.438)	0.505	0.160	Brass	Plain	1.17
MS35650-1602	5/16	24	1/2 (0.500)	0.577	0.193	Carbon Steel	Zinc Plated	2.10
MS35650-1603	5/16	24	1/2 (0.500)	0.577	0.193	Stainless Steel (CRES 300)	Passivated	2.10
MS35650-1604	5/16	24	1/2 (0.500)	0.577	0.193	Brass	Plain	1.89
MS35650-1802	3/8	24	9/16 (0.562)	0.650	0.225	Carbon Steel	Zinc Plated	3.40
MS35650-1803	3/8	24	9/16 (0.562)	0.650	0.225	Stainless Steel (CRES 300)	Passivated	3.40
MS35650-1804	3/8	24	9/16 (0.562)	0.650	0.225	Brass	Plain	3.06
MS35650-2002	7/16	20	5/8 (0.625)	0.722	0.257	Carbon Steel	Zinc Plated	5.10
MS35650-2003	7/16	20	5/8 (0.625)	0.722	0.257	Stainless Steel (CRES 300)	Passivated	5.10
MS35650-2004	7/16	20	5/8 (0.625)	0.722	0.257	Brass	Plain	4.59
MS35650-2202	1/2	20	3/4 (0.750)	0.866	0.289	Carbon Steel	Zinc Plated	7.80
MS35650-2203	1/2	20	3/4 (0.750)	0.866	0.289	Stainless Steel (CRES 300)	Passivated	7.80
MS35650-2204	1/2	20	3/4 (0.750)	0.866	0.289	Brass	Plain	7.02

Part Number Decoding

MS35650-[Size Code][Material Code]

The dash number is a combined code where the leading digits identify the nominal size and the trailing digit identifies the material and surface treatment:

Size Code	Nominal Size	Thread (UNF)
3x	#2	2-56 UNF-2B
4x	#4	4-48 UNF-2B
6x	#6	6-40 UNF-2B
8x	#8	8-36 UNF-2B
10x	#10	10-32 UNF-2B
14x	1/4"	1/4-28 UNF-2B
16x	5/16"	5/16-24 UNF-2B
18x	3/8"	3/8-24 UNF-2B
20x	7/16"	7/16-20 UNF-2B
22x	1/2"	1/2-20 UNF-2B

Material Code (last digit)	Material	Surface Treatment
2	Carbon Steel	Zinc Plated
3	Stainless Steel (CRES 300)	Passivated
4	Brass	Plain

Selection Guide

Material	Finish	Tensile Strength	Corrosion Resistance	Typical Application
Carbon Steel (SAE 1010–1035)	Zinc Plated (per QQ-Z-325)	High	Moderate	General structural, indoor assemblies, cost-sensitive applications
Stainless Steel CRES 300 (18-8)	Passivated (per QQ-P-35)	Medium-High	Excellent	Marine, chemical, food-grade, aerospace environments
Brass (UNS C36000)	Plain (as-machined)	Medium	Good	Electrical/electronic assemblies, non-magnetic requirements, decorative use

Standard & Compliance

• Governing Standard: MS35650 Rev G (U.S. Military Standard)
• Thread Standard: ASME B1.1 — Unified Inch Screw Threads, UNF Class 2B
• Dimensional Inspection: Per MS35650G drawing tolerances
• Material Certification: Mill certificates and material test reports (MTR) available upon request
• Plating Standards: Zinc per QQ-Z-325; Passivation per QQ-P-35
• Related Standards: AN365, MS20365 (predecessor series); ASME B18.2.2 (hex nut dimensions reference)

Product Gallery

Why FULLERKREG

• 🏭 Direct Manufacturer — Full in-house production from raw material to finished fastener
• 📐 MIL-SPEC Precision — Strict dimensional control per MS35650G drawing tolerances
• 🔬 Material Traceability — Full MTR and CoC documentation available for every lot
• 📦 Bulk & MOQ Flexibility — Wholesale pricing from small reels to full container loads
• 🌍 Global Export Ready — Experienced in international shipping, customs documentation, and compliance
• ⚙️ Custom Configurations — Special materials, finishes, or packaging available on request