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21L1-2 — COCK,PLUG

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

21L1-2: COCK,PLUG.

The COCK,PLUG is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, flow_style: TWO WAY TWO PORT 90 DEGREE PLUG TURN, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN, OPTIONAL END (PIPE) ALL ENDS, thread_direction: RIGHT-HAND ALL ENDS, nominal_thread_size: 0.500 INCHES ALL ENDS IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-624-9982, 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
21L1-2
NSN: 5340-00-624-9982
NIINs: 006249982, 011995700
FSC: 5340 — Hardware, Commercial
CAGE: 71286 — HOWMET GLOBAL FASTENING SYSTEMS INC DIV CAMLOC PRODUCTS (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
flow_styleTWO WAY TWO PORT 90 DEGREE PLUG TURN
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN, OPTIONAL END (PIPE) ALL ENDS
thread_directionRIGHT-HAND ALL ENDS
nominal_thread_size0.500 INCHES ALL ENDS IN
valve_operation_methodMANUAL
media_for_which_designedGAS, INERT SINGLE RESPONSE
thread_series_designatorNPT ALL ENDS
NSN5340-00-624-9982
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21L1-2 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
•
MOUNTING FACILITY: THREADED HOLE(S)
•
SURFACE TREATMENT: UNABLE TO DECODE
•
MATERIAL: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS
OVERALL LENGTH1.109 INCHES MINIMUM AND 1.161 INCHES MAXIMUM IN
OVERALL WIDTH0.511 INCHES MINIMUM AND 0.521 INCHES MAXIMUM IN
MOUNTING FACILITYTHREADED HOLE(S)
SURFACE TREATMENTUNABLE TO DECODE
MATERIALUNABLE TO DECODE
SUBSTITUTES & CROSS-REFERENCES 2
GF500A2Reference document
Same NSN cross-reference
Reference document — Secondary reference
SMC209782-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 21L1-2?
21L1-2 is a COCK,PLUG.
What parts can replace 21L1-2?
There are 2 known substitutes for 21L1-2: GF500A2, SMC209782-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 21L1-2?
21L1-2 is cataloged in the U.S. Government catalog under NSN 5340-00-624-9982. 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.