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N1137 — FLAPPER,VALVE,COMPRESSOR AIR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

N1137: FLAPPER,VALVE,COMPRESSOR AIR.

The FLAPPER,VALVE,COMPRESSOR AIR is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: FLAT CHAMFER, head_height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, thread_class: 3A A, head_diameter: 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_length: 0.875 INCHES MINIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-353-2022, 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
N1137
NSN: 4820-00-353-2022
NIINs: 003532022, 009038287
FSC: 4820 — Valves, Nonpowered
CAGE: 06721 — HALDEX BRAKE PRODUCTS CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleFLAT CHAMFER
head_height0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
thread_class3A A
head_diameter0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.875 INCHES MINIMUM IN
fastener_length1.000 INCHES NOMINAL IN
hardness_rating36.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
width_across_flats0.158 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.190 INCHES IN
NSN4820-00-353-2022
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: N1137 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: SWEDISH FLAPPER VALVE QUALITY STEEL;1.422 IN. O/A LG,0.374 IN. W,0.015 IN. MATERIAL THICKNESS,W/ONE HOLE IN SQ END 0.088 IN. DIA 0.127 IN. FROM END TO HOLE CENTER 0.185 IN. FROM SIDE TO HOLE CENTER,OTHER END ROUNDED;ITEM TO BE DEMAGNETIZED AFTER TUMBLING IN
TECHNICAL CHARACTERISTICS
GENERAL CHARACTERISTICS ITEM DESCRIPTIONSWEDISH FLAPPER VALVE QUALITY STEEL;1.422 IN. O/A LG,0.374 IN. W,0.015 IN. MATERIAL THICKNESS,W/ONE HOLE IN SQ END 0.088 IN. DIA 0.127 IN. FROM END TO HOLE CENTER 0.185 IN. FROM SIDE TO HOLE CENTER,OTHER END ROUNDED;ITEM TO BE DEMAGNETIZED AFTER TUMBLING IN
SUBSTITUTES & CROSS-REFERENCES 2
7350502Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
P26723Reference 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 N1137?
N1137 is a FLAPPER,VALVE,COMPRESSOR AIR.
What parts can replace N1137?
There are 2 known substitutes for N1137: 7350502, P26723. Substitute compatibility should be verified for your specific system.
What is the NSN for N1137?
N1137 is cataloged in the U.S. Government catalog under NSN 4820-00-353-2022. 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.