Model: 18257-025

Hexagon Head Cap Screw

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
1.250 inches
Fastener Length
1.250 inches
Head Style
Hexagon
Head Height
Between 0.302 inches and 0.323 inches
Width Between Flats
Between 0.736 inches and 0.750 inches
End Application
Contact maintenance truck, b-1 support equipment, aircraft refueler vehicle, boilers, compressors, firepumps, stream, shipboard material handling eq, mk-48 torpedo; rg-33 armored utility vehicle (auv); rg-33 mrap
Thread Diameter
0.500 inches
Thready Qty Per Inch (tpi)
13
Min. Tensile Strength (psi)
150000 pounds per square inch
Hardness Rating
33.0 rockwell c and 39.0 rockwell c
Minimum Yield Strength
130000 pounds per square inch
Material
Steel
Material Specification
Sae j429, grade 8 assn standard single material response or astm a354, grade bd assn standard single material response
Surface Treatment
Zinc and chromate
Surface Treatment Specification
Astm b633 type 2 sc 3 assn standard single treatment response
Thread Series Designator
Unc
NSN
5305-00-071-2067
Part Number
18257-025
Description
Screw,cap,hexagon Head
CAGE
D2638

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. the threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. the thread length being the controlled dimension, the grip length is not specified. a locking feature may be incorporated in the design of the head or threads. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. excludes bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

Part 18257-025 NSN 5305-00-071-2067

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
18257
FIIG:
A003B0
Concept No.:
App. Key:
SB
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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