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1T550 — PIN,SPRING

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

1T550: PIN,SPRING.

The PIN,SPRING is a the manufacturer industrial component. Key specifications include diameter: 7.94 MILLIMETERS NOMINAL MM, material: STEEL OVERALL, overall_length: 25.4 MILLIMETERS NOMINAL MM, material_document_and_classification: 1E575,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-4516, 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
1T550
NSN: 5310-00-209-4516
NIINs: 002094516, 011604640
FSC: 5310 — Nuts and Washers
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
diameter7.94 MILLIMETERS NOMINAL MM
materialSTEEL OVERALL
overall_length25.4 MILLIMETERS NOMINAL MM
material_document_and_classification1E575,FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-209-4516
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1T550 · 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
•
OVERALL DIAMETER: 0.750 INCHES NOMINAL IN
•
HARDNESS RATING: 60.0 ROCKWELL C NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
MATERIAL: STEEL COMP 1015 OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 0.410 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER0.750 INCHES NOMINAL IN
HARDNESS RATING60.0 ROCKWELL C NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
MATERIALSTEEL COMP 1015 OVERALL
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER0.410 INCHES NOMINAL IN
THICKNESS0.109 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 2
FF-W-92Reference document
Same NSN cross-reference
Reference document — Identification reference
M5839Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1T550?
1T550 is a PIN,SPRING.
What parts can replace 1T550?
There are 2 known substitutes for 1T550: FF-W-92, M5839. Substitute compatibility should be verified for your specific system.
What is the NSN for 1T550?
1T550 is cataloged in the U.S. Government catalog under NSN 5310-00-209-4516. 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.