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GR531W4-3 — NUT,PLAIN,CLINCH

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

GR531W4-3: NUT,PLAIN,CLINCH.

The NUT,PLAIN,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, nut_style: CLINCH, nut_height: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN, nut_diameter: 0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN, pilot_length: 0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN, thread_class: 2B. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-127-1532, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
GR531W4-3
NSN: 5310-01-127-1532
FSC: 5310 — Nuts and Washers
CAGE: 1YGB8 — CAREY MANUFACTURING CO, INC DBA AMATOM ELECTRONIC HARDWARE DIV AMATOM ELECTRONIC HARDWARE (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
nut_styleCLINCH
nut_height0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
nut_diameter0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
pilot_length0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNF
pilot_diameter0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_size0.250 INCHES IN
counterbore_diameter0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM NUT IN
nut_counterbore_depth0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM NUT IN
NSN5310-01-127-1532
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GR531W4-3 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES: UNF
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
NUT COUNTERBORE DEPTH: 0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM NUT IN
•
THREAD DIRECTION: RIGHT-HAND
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
NUT DIAMETER: 0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
•
COUNTERBORE DIAMETER: 0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM NUT IN
•
PILOT DIAMETER: 0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
THREAD SERIESUNF
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A581 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NUT COUNTERBORE DEPTH0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM NUT IN
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD SIZE0.250 INCHES IN
NUT DIAMETER0.528 INCHES MINIMUM AND 0.534 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.374 INCHES MINIMUM AND 0.377 INCHES MAXIMUM NUT IN
PILOT DIAMETER0.430 INCHES MINIMUM AND 0.433 INCHES MAXIMUM IN
PILOT LENGTH0.088 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN
NUT HEIGHT0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
6297B-SS-2528Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GR531W4-3?
GR531W4-3 is a NUT,PLAIN,CLINCH.
What parts can replace GR531W4-3?
There is 1 known substitute for GR531W4-3: 6297B-SS-2528. Substitute compatibility should be verified for your specific system.
What is the NSN for GR531W4-3?
GR531W4-3 is cataloged in the U.S. Government catalog under NSN 5310-01-127-1532. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.