DIN 65480 MJ Thread Self-Locking Hex Flange Nut

FULLERKREG DIN 65480 self-locking nuts feature a hexagonal flange body with an MJ thread form and a mechanically deformed upper locking zone — engineered to maintain clamp load under vibration without secondary locking elements. Manufactured from AMS5646 (Alloy 347) or AMS5645 (Alloy 321) austenitic stainless steel wire, these nuts meet the full requirements of DIN 267, Part 15, Class 19 and are surface-treated per AMS2410 (silver plate) with fluorescent penetrant inspection per AMS2645.

Designed for aerospace structural and engine applications where MJ thread engagement, corrosion resistance, and reliable prevailing torque are mandatory.

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Key Features

• 🔩 Standard: DIN 65480 | Procurement Spec: DIN 267, Part 15, Class 19
• 🧲 Thread Form: MJ metric thread (4H6H / 4H5H tolerance class)
• ⚙️ Locking Mechanism: Upper thread zone mechanically deformed to produce prevailing torque — no insert required
• 🛡️ Material: AMS5646 (Alloy 347) or AMS5645 (Alloy 321) stainless steel wire
• ✈️ Surface Treatment: Silver plate per AMS2410
• 🔬 Inspection: Fluorescent penetrant inspection per AMS2645; surface roughness verified
• 📐 Coating Thickness: 0.005–0.010 mm
• 📏 Break Sharp Edges: 0.08–0.25 mm
• 🏭 Brand: FULLERKREG — aerospace fastener specialist

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Dimensional Data

Note: Dimension A (across flats) includes deformation of the self-locking device. All dimensions in mm. Wire dia: 4.216 ± 0.025 mm.

Drawing No.	Thread	A — Flange OD (mm)	H — Nut Height (mm)	W — Across Flats (mm)	Unit Weight (kg/100pcs)
DIN65480-03D / D04-MJ3-10	MJ3 × 0.5 – 4H6H	6.0	3.0	4	0.028
DIN65480-04D / D04-MJ4-10	MJ4 × 0.7 – 4H6H	7.4	4.0	5	0.05
DIN65480-05D / D04-MJ5-10	MJ5 × 0.8 – 4H6H	9.1	5.0	6	0.08
DIN65480-06D / D04-MJ6-10	MJ6 × 1.0 – 4H5H	10.6	5.4	7	0.115
DIN65480-07D / D04-MJ7-10	MJ7 × 1.0 – 4H5H	12.1	6.3	8	0.17
DIN65480-08D / D04-MJ8-10	MJ8 × 1.0 – 4H5H	13.6	7.2	10	0.315
DIN65480-10D / D04-MJ10-10	MJ10 × 1.25 – 4H5H	16.8	9.0	12	0.475
DIN65480-12D / D04-MJ12-10	MJ12 × 1.25 – 4H5H	19.9	10.8	14	1.000

Drawing Reference (DIN65480-04D / P/N: D04-MJ4-10):

• Head marks: NONE
• Thread tolerance: M4×0.7 – 4H6H (example); C'SK 90°, 120° to dia 4.00–4.25 both sides
• Flange OD nominal (MJ4): 4.20 / 3.90 mm step; overall height 7.06 / 6.81 mm
• Across flats min (MJ4): 5.45 MIN; head OD: 5.00 / 4.82 mm
• Locking zone: upper threaded portion deformed to produce self-locking (e)
• Surface texture: per ISO 1302 | Prevailing torques per DIN 267, Part 15, Class 10

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Material & Process Specifications

Item	Specification
Material (Option A)	AMS5646 — Alloy 347 (Cb+Ta stabilized austenitic SS)
Material (Option B)	AMS5645 — Alloy 321 (Ti stabilized austenitic SS)
Wire Diameter	4.216 ± 0.025 mm
Surface Treatment	Silver plate per AMS2410
NDT Inspection	Fluorescent penetrant inspection per AMS2645
Surface Roughness	Per drawing callout
Coating Thickness	0.005–0.010 mm
Break Sharp Edges	0.08–0.25 mm
Prevailing Torque Class	DIN 267, Part 15, Class 10 (ground) / Class 19 (procurement)

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Selection Guide

Requirement	Recommended Size / Grade
Lightweight aerospace bracket fastening	MJ3–MJ5, Alloy 321 (AMS5645)
High-temperature engine zone	MJ6–MJ8, Alloy 347 (AMS5646) — superior oxidation resistance
Structural joint with high vibration	MJ8–MJ12, 4H5H tolerance, prevailing torque per DIN 267 Pt.15
Silver-plated contact surface required	All sizes — AMS2410 silver plate standard
Fluorescent penetrant inspection required	All sizes — AMS2645 FPI standard

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Standard Reference

DIN 65480 specifies hexagon nuts with flange and MJ thread, self-locking type, for aerospace applications. The MJ thread profile features a larger root radius than standard M threads, reducing stress concentration and improving fatigue life — critical for flight-critical fastener joints. Prevailing torque is achieved by mechanical deformation of the upper thread zone (no nylon insert), making these nuts suitable for elevated temperature environments where polymer inserts would degrade.

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Product Gallery

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Why FULLERKREG

• 🏭 Aerospace-Grade Manufacturing — DIN 65480 compliant, AMS-certified materials and processes
• 📋 Full Traceability — Material certs, FPI reports, and dimensional inspection records available per order
• 🔬 Dual-Material Offering — Alloy 347 (AMS5646) and Alloy 321 (AMS5645) in stock
• 📦 Wholesale & OEM Supply — Bulk pricing, blanket orders, and custom packaging available
• ⚡ Fast Quote Turnaround — Engineering support and competitive pricing within 24 hours
• 🌐 Global Shipping — Export-ready with full documentation for international aerospace supply chains