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ST4M138-04-36 — STANDOFF,THREADED,SPACING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST4M138-04-36: STANDOFF,THREADED,SPACING.

The STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 3.500 INCHES MINIMUM AND 3.700 INCHES MAXIMUM IN, special_features: INSERT INCLUDED; STEEL PER AMS7245, style_designator: LEFT INTERNAL AND RIGHT INTERNAL THREADS, width_across_flats: 0.250 INCHES NOMINAL IN, cross-sectional_shape: HEXAGON, left_counterbore_depth: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-196-5548, 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
ST4M138-04-36
NSN: 5340-01-196-5548
FSC: 5340 — Hardware, Commercial
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
length3.500 INCHES MINIMUM AND 3.700 INCHES MAXIMUM IN
special_featuresINSERT INCLUDED; STEEL PER AMS7245
style_designatorLEFT INTERNAL AND RIGHT INTERNAL THREADS
width_across_flats0.250 INCHES NOMINAL IN
cross-sectional_shapeHEXAGON
left_counterbore_depth1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
right_counterbore_depth1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
left_counterbore_diameter0.140 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
NSN5340-01-196-5548
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST4M138-04-36 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
•
LEFT COUNTERBORE DEPTH: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL IN
•
LENGTH: 3.500 INCHES MINIMUM AND 3.700 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: LEFT INTERNAL AND RIGHT INTERNAL THREADS
•
RIGHT COUNTERBORE DEPTH: 1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
•
LEFT COUNTERBORE DIAMETER: 0.140 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE: HEXAGON
TECHNICAL CHARACTERISTICS
LEFT COUNTERBORE DEPTH1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.250 INCHES NOMINAL IN
LENGTH3.500 INCHES MINIMUM AND 3.700 INCHES MAXIMUM IN
STYLE DESIGNATORLEFT INTERNAL AND RIGHT INTERNAL THREADS
RIGHT COUNTERBORE DEPTH1.000 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
LEFT COUNTERBORE DIAMETER0.140 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPEHEXAGON
SPECIAL FEATURESINSERT INCLUDED; STEEL PER AMS7245
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
10154133Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST4M138-04-36?
ST4M138-04-36 is a STANDOFF,THREADED,SPACING.
What parts can replace ST4M138-04-36?
There is 1 known substitute for ST4M138-04-36: 10154133. Substitute compatibility should be verified for your specific system.
What is the NSN for ST4M138-04-36?
ST4M138-04-36 is cataloged in the U.S. Government catalog under NSN 5340-01-196-5548. This indicates validated use in U.S. government and defense supply chains.
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