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PT948 — WASHER,KEY

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

PT948: WASHER,KEY.

The WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1020 OVERALL, hole_diameter: 1.781 INCHES NOMINAL IN, outside_diameter: 3.500 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.062 INCHES NOMINAL IN, external_prebent_key_width: 0.281 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-209-3271, 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
PT948
NSN: 5310-00-209-3271
FSC: 5310 — Nuts and Washers
CAGE: 77873 — ROCKFORD POWERTRAIN INC DIV POWERTRAIN ROCKFORD, INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 1020 OVERALL
hole_diameter1.781 INCHES NOMINAL IN
outside_diameter3.500 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.062 INCHES NOMINAL IN
external_key_quantity1
external_prebent_key_width0.281 INCHES NOMINAL IN
external_prebent_key_length0.187 INCHES NOMINAL IN
material_document_and_classificationQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
distance_from_centerline_to_inside_of_prebent_key1.500 INCHES NOMINAL IN
NSN5310-00-209-3271
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: PT948 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 1.500 INCHES NOMINAL IN
•
EXTERNAL PREBENT KEY LENGTH: 0.187 INCHES NOMINAL IN
•
STYLE DESIGNATOR: KEY
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 3.500 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
EXTERNAL KEY QUANTITY: 1
•
EXTERNAL PREBENT KEY WIDTH: 0.281 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY1.500 INCHES NOMINAL IN
EXTERNAL PREBENT KEY LENGTH0.187 INCHES NOMINAL IN
STYLE DESIGNATORKEY
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER3.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
EXTERNAL KEY QUANTITY1
EXTERNAL PREBENT KEY WIDTH0.281 INCHES NOMINAL IN
MATERIALSTEEL COMP 1020 OVERALL
HOLE DIAMETER1.781 INCHES NOMINAL 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
5192840Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PT948?
PT948 is a WASHER,KEY.
What parts can replace PT948?
There is 1 known substitute for PT948: 5192840. Substitute compatibility should be verified for your specific system.
What is the NSN for PT948?
PT948 is cataloged in the U.S. Government catalog under NSN 5310-00-209-3271. 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.