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28991 — CYLINDER ASSEMBLY,ACTUATING,LINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

28991: CYLINDER ASSEMBLY,ACTUATING,LINE.

CYLINDER ASSEMBLY,ACTUATING,LINE. Key specifications include general_characteristics_item_description: ALUMINUM ALLOY; 0.6250 IN. LONG; 8.1250 IN.

DIA IN. This part is cataloged in the U.S. Government catalog under NSN 5310-01-121-1310, 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
28991
NSN: 5310-01-121-1310
NIINs: 011211310, 011345964, 011610724, 011649665, 013125668
FSC: 5310 — Nuts and Washers
CAGE: 80739 — BEATRICE FOODS CO TAYLOR FREEZER DIV (USA)
SPECIFICATIONS
general_characteristics_item_descriptionALUMINUM ALLOY; 0.6250 IN. LONG; 8.1250 IN. DIA IN
NSN5310-01-121-1310
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 28991 · 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
SUBSTITUTES & CROSS-REFERENCES 1
028991Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 28991?
28991 is a CYLINDER ASSEMBLY,ACTUATING,LINE.
What parts can replace 28991?
There is 1 known substitute for 28991: 028991. Substitute compatibility should be verified for your specific system.
What is the NSN for 28991?
28991 is cataloged in the U.S. Government catalog under NSN 5310-01-121-1310. This indicates validated use in U.S. government and defense supply chains.
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