B2B & Suppliers
IBC Tote vs Steel Drum: 49% More Liters Per Square Meter
IBC tote vs steel drum, decided with real numbers: footprints, UN codes 31HA1 and 1A1, retest clocks, and how much liquid each holds per square meter of floor.
B2B & Suppliers
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B2B & Suppliers
H7/h6 Fit Tolerance: Clearance, Not Transition
H7/h6 fit tolerance is a clearance fit, not a transition fit. What H, h, 6 and 7 mean, the ISO 286 numbers at 25 mm, and where the code belongs.
B2B & Suppliers
Gear Module vs Diametral Pitch: 25.4 Is Not a Fit
Gear module vs diametral pitch: the 25.4 conversion lines up two quotes and never guarantees a fit. Four sourcing scenarios and the spec block buyers can check.
B2B & Suppliers
JIC vs ORFS vs BSP: The Fitting That Screws On and Leaks
JIC vs ORFS vs BSP fittings can share the same thread but seal in three different places. The 60-second ID routine and the dash-size trap table.
B2B & Suppliers
Office Chair Seat Height Standard: Four Types, Four Ranges
Office chair seat height standard by type: EN 1335-1 Table 2 values for Ax, A, B and C, why BIFMA sets none, and the 4 lines export buyers check.
B2B & Suppliers
FIBC Safety Factor: What 5:1 and 6:1 Actually Prove
FIBC safety factor is a design type-test ratio, not a strength rating. What 5:1, 6:1 and the 1.8 stacking factor really prove, and what the label must carry.
B2B & Suppliers
WLL vs MBL: 6 Labels That Get Slings Rejected
WLL vs MBL differ by a design factor of 2:1 to 7:1, so the wrong label overstates capacity by a multiple. Six rejected patterns and what to write instead.
B2B & Suppliers
NPT vs BSP Thread: They Screw Together, Then They Leak
NPT vs BSP thread runs 14 TPI in both at 1/2 in, so it assembles and then leaks. TPI and major-diameter tables, plus an eight-field callout template.
B2B & Suppliers
Mesh Count vs Micron: Same 100 Mesh, 51 Microns Apart
Mesh count vs micron: mesh is a weave density, not an aperture. Two 100-mesh cloths can differ by 51 microns and both be honestly labelled.
B2B & Suppliers
Shore A vs Shore D: Why 'Shore 70' Is Not a Spec
Shore A vs Shore D hardness are two instruments, not two precisions: why 'Shore 70' is not a spec, why no conversion exists, and how to write a callout that holds.
B2B & Suppliers
Ra vs Rz: Same Number, Two Completely Different Surfaces
Ra vs Rz measure different things — two parts can share an Ra and only one will seal. What each parameter sees, why no conversion factor works, and what ISO 21920 changed.
B2B & Suppliers
Cover Width vs Overall Width: 1,000 mm That Covers 840
Cover width vs overall width decides panel count: a 1,000 mm sheet covers 840 mm. The profile table, the panel-count formula and where the 25% shortfall comes from.