PartsTable
Technical Data Sheet
Download PDF

21953-1 — TIE DOWNS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21953-1: TIE DOWNS.

The TIE DOWNS is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, overall_diameter: 0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN, surface_treatment: PASSIVATE, fsc_application_data: 1660-00-325-2746, end_item_identification: KC-135, part_name_assigned_by_controlling_agency: TYPE A HOLD DOWN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-270-8468, 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
21953-1
NSN: 5330-00-270-8468
NIINs: 002708468, 010669671, 014670780
FSC: 5330 — Packing and Gasket Materials
CAGE: 27235 — HARDIE-TYNES CO., INC. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
overall_diameter0.850 INCHES MINIMUM AND 0.870 INCHES MAXIMUM IN
surface_treatmentPASSIVATE
fsc_application_data1660-00-325-2746
end_item_identificationKC-135
part_name_assigned_by_controlling_agencyTYPE A HOLD DOWN
NSN5330-00-270-8468
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21953-1 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LENGTH: 36.000 INCHES MINIMUM AND 48.000 INCHES MAXIMUM IN
•
FIBER TYPE: ANIMAL OR PLANT
•
MATERIAL DOCUMENT AND CLASSIFICATION: HH-P-96, TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
•
ENVIRONMENTAL PROTECTION: GASOLINE OR OIL RESISTANT AND WATER RESISTANT
•
WIDTH: 36.000 INCHES MINIMUM AND 48.000 INCHES MAXIMUM IN
•
MATERIAL: PAPER AND GLUE AND GLYCERIN LOCATION NOT OTHERWISE SPECIFIED
•
THICKNESS: 0.016 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH36.000 INCHES MINIMUM AND 48.000 INCHES MAXIMUM IN
FIBER TYPEANIMAL OR PLANT
MATERIAL DOCUMENT AND CLASSIFICATIONHH-P-96, TYPE 1 FED SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
NONDEFINITIVE SPEC/STD DATA1 TYPE
ENVIRONMENTAL PROTECTIONGASOLINE OR OIL RESISTANT AND WATER RESISTANT
WIDTH36.000 INCHES MINIMUM AND 48.000 INCHES MAXIMUM IN
MATERIALPAPER AND GLUE AND GLYCERIN LOCATION NOT OTHERWISE SPECIFIED
THICKNESS0.016 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 9
60-306 PIECE 537Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
HHP96-1-64INReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
17-584Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
SF10146 PIECE11Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
DD-4639 REF NO. 13Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
D15-414W682Reference 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
Ready to buy 21953-1?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 21953-1?
21953-1 is a TIE DOWNS.
What parts can replace 21953-1?
There are 9 known substitutes for 21953-1: 60-306 PIECE 537, HHP96-1-64IN, 17-584 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21953-1?
21953-1 is cataloged in the U.S. Government catalog under NSN 5330-00-270-8468. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 21953-1

✓ 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.