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PartsTable / COMPONENT / GS534A1
GS534A1 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The PIN,GROOVED,HEADLESS is a the manufacturer industrial component. Key specifications include diameter: 0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN, material: STEEL COMP 303SE OVERALL, overall_length: 0.875 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES OVERALL, undercut_width: 0.012 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN, first_end_style: SQUARE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-491-1366, 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
GS534A1
NSN: 5315-00-491-1366
FSC: 5315
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
diameter0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
materialSTEEL COMP 303SE OVERALL
overall_length0.875 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES OVERALL
undercut_width0.012 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
first_end_styleSQUARE
effective_length0.784 INCHES MINIMUM AND 0.788 INCHES MAXIMUM IN
style_designatorGROOVE
surface_treatmentPASSIVATE OVERALL
undercut_diameter0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
first_end_locationBOTH ENDS
second_undercut_width0.012 INCHES MINIMUM AND 0.014 INCHES MAXIMUM IN
NSN5315-00-491-1366
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: GS534A1 · 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
•
UNDERCUT DIAMETER: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
FIRST END STYLE: SQUARE
•
DIAMETER: 0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
•
SURFACE FINISH: 125.0 MICROINCHES OVERALL
•
STYLE DESIGNATOR: GROOVE
TECHNICAL CHARACTERISTICS (FLIS)
UNDERCUT DIAMETER0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN
OVERALL LENGTH0.875 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
FIRST END STYLESQUARE
DIAMETER0.1248 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
SURFACE FINISH125.0 MICROINCHES OVERALL
STYLE DESIGNATORGROOVE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,TYPE 303SE,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
161-291Interchangeable
interchangeable cross-reference
interchangeable
10 MALE PLUGInterchangeable
interchangeable cross-reference
interchangeable
10-3SInterchangeable
interchangeable cross-reference
interchangeable
278-1803-000Interchangeable
interchangeable cross-reference
interchangeable
01-406Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GS534A1?
GS534A1 is a PIN,GROOVED,HEADLESS.
What parts can replace GS534A1?
There are 5 known substitutes for GS534A1: 161-291, 10 MALE PLUG, 10-3S and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GS534A1?
GS534A1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-491-1366. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026